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aalyn [17]
2 years ago
15

Fear me or i am glory i give you free p oints \ / _| |_

Physics
2 answers:
svp [43]2 years ago
6 0

Answer:

AAAAAAAAAAH

Explanation:

scary '='

8_murik_8 [283]2 years ago
3 0

Answer:

kayyy

Explanation:

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Answer:

a. 952Joules

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The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency, ????0 . Find the minimu
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Answer:

Explanation:

Threshold frequency = 4.17 x 10¹⁴ Hz .

minimum energy required = hν where h is plank's constant and ν is frequency .

E = 6.6 x 10⁻³⁴ x 4.17 x 10¹⁴

= 27.52 x 10⁻²⁰ J .

wavelength of radiation falling = 245 x 10⁻⁹ m

Energy of this radiation = hc / λ

c is velocity of light and  λ  is wavelength of radiation .

= 6.6 x 10⁻³⁴ x 3 x 10⁸ / 245 x 10⁻⁹

= .08081 x 10⁻¹⁷ J

= 80.81 x 10⁻²⁰ J

kinetic energy of electrons ejected = energy of falling radiation - threshold energy

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4 0
3 years ago
Calculate the current through a 3.0 ω resistor with a voltage of 9.0 v across it.
gulaghasi [49]

Answer: 3 A

Explanation:

According to<u> Ohm's law</u>:  

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R=3\Omega is the resistance of the resistor

I is the electric current (the value we want to find)

Isolating I:

I=\frac{V}{R}

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Finally:

I=3 A

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